diff --git a/pkgs/top-level/ruby-packages.nix b/pkgs/top-level/ruby-packages.nix
index 4ae1a50eb757..d1bf5cf7b69e 100644
--- a/pkgs/top-level/ruby-packages.nix
+++ b/pkgs/top-level/ruby-packages.nix
@@ -1013,10 +1013,10 @@
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1l6mvn60qa215rjy0zjymvjb0vcgnbi4vj9d80v4qq1n6b9ld9xy";
+      sha256 = "sha256-bkSvvD2SClHJ5FyERpyqZaWp0im7NNhn+wplbmnZD84=";
       type = "gem";
     };
-    version = "1.12.0";
+    version = "1.13.1";
   };
   github-pages = {
     dependencies = ["github-pages-health-check" "jekyll" "jekyll-avatar" "jekyll-coffeescript" "jekyll-commonmark-ghpages" "jekyll-default-layout" "jekyll-feed" "jekyll-gist" "jekyll-github-metadata" "jekyll-include-cache" "jekyll-mentions" "jekyll-optional-front-matter" "jekyll-paginate" "jekyll-readme-index" "jekyll-redirect-from" "jekyll-relative-links" "jekyll-remote-theme" "jekyll-sass-converter" "jekyll-seo-tag" "jekyll-sitemap" "jekyll-swiss" "jekyll-theme-architect" "jekyll-theme-cayman" "jekyll-theme-dinky" "jekyll-theme-hacker" "jekyll-theme-leap-day" "jekyll-theme-merlot" "jekyll-theme-midnight" "jekyll-theme-minimal" "jekyll-theme-modernist" "jekyll-theme-primer" "jekyll-theme-slate" "jekyll-theme-tactile" "jekyll-theme-time-machine" "jekyll-titles-from-headings" "jemoji" "kramdown" "kramdown-parser-gfm" "liquid" "mercenary" "minima" "nokogiri" "rouge" "terminal-table"];